May have learnt how to use Iris

I think I have found out how to use Iris to remove light pollution.

I used the tutorial here: http://www.boltonastro​.org.uk/Forums/viewtop​ic.php?f=4&t=60
I started from the Processing your image section. It is a stack of 12 lights and 11 darks.

This is my attempt at capturing the area around Sadr last night.

HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

If you have photoshop you could try this to remove light pollution http://galacticfool.co​m …ight-pollution-photoshop/
and this to remove uneven field illumination http://www.astropix.co​m/HTML/J_DIGIT/VIGNET.​HTM

Thanks for the suggestion. I have used the method in Galactic Fool, but I found it very time consuming. I have found that Iris has a simple one step function that does both functions in one go. There is a more advanced version, but I think the way shown in that tutorial seems easy enough. I only dealt with the Gradient removal (polynomial).

I will try the other techniques once I have more time.